Harinezumi

Harinezumi (Japanese: はりねずみくん) is a leisurely hedgehog character created by the Japanese company Sanrio. He is one of My Melody's friends and recieved a notable role in Onegai My Melody.

In Onegai My Melody
In the first three seasons of Onegai My Melody, Harinezumi plays a vital role, speaking to the viewer to give them any additional context or information needed in a scene, as well as affecting the show's universe by rolling back the memories of those who come into contact with nightmare magic. During an event in 2019, Makoto Moriwaki (the director of the Onegai My Melody anime series) revealed that the idea of Harinezumi rolling back people's memories was a meta way of including himself in the show, as he is the one rolling back the memories of the characters.